| Name | Total | ... |
|---|---|---|
| OneLookers | 1 | GO |
| Onemu Hormone | 1 | GO |
| ONEONE1 | 13 | GO |
| ONE-SEVEN | 4 | GO |
| Ongire | 2 | GO |
| Oni 69Dan | 4 | GO |
| Onichikusyou | 1 | GO |
| ONIGRIS | 1 | GO |
| Onkin Yuugi | 1 | GO |
| Onna Kishi no Shiro | 1 | GO |
| Onnanoko Payapaya | 1 | GO |
| Onsoku Ebifly | 10 | GO |
| Onsoku Ubaguruma | 3 | GO |
| Ooarai Nourakudou | 1 | GO |
| Oogon Purin | 1 | GO |
| Oohashiya | 1 | GO |
| Oojinushi | 3 | GO |
| Ooki na Kodomo no Omocha Bako | 1 | GO |
| Ookinayasinokinositade | 1 | GO |
| Oomune Soft | 1 | GO |
| Opaque | 4 | GO |
| O-Penguin | 1 | GO |
| Operating Room | 3 | GO |
| Oppai Baibai | 1 | GO |
| Oracle Eggs | 3 | GO |
| Orange Bullet | 1 | GO |
| Orange Crown | 1 | GO |
| Orange Milk Donuts | 1 | GO |
| Orange Mill | 1 | GO |
| Orange Peels | 6 | GO |
| ORANGE POP | 1 | GO |
| Orange Restaurant | 1 | GO |
| Orange Star | 1 | GO |
| Orange Typhoon | 1 | GO |
| Orange☆Blossom | 1 | GO |
| ORANGE☆CHANNEL | 1 | GO |